Disc hub bearing unit 55906 4-hole SKF type frame 80x80

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Disc hub bearing unit 55906 4-hole SKF type frame 80x80

Disc hub bearing unit part number 55906 designed for 4-bolt tillage discs, SKF type configuration for 80x80 mm frames. Features a 4-hole flange with 98 mm hole spacing and M12x1.25 threads, paired with an M22x1.5 center shaft thread. Cross referenced to OEM codes F06160015R and 910974, delivering smooth rotation and dependable sealing against dirt and moisture.

Direct OEM interchangeability
Tailored for 80x80 mm frames
SKF-type hub engineering

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Description

Independent disc harrow hub unit 4-hole PCD 98 mm for 80x80 frame - Part number 55906

Replacement independent disc harrow bearing hub unit for compact disc cultivators and speed discs, commercial part number 55906. Engineered specifically for fitment on 80x80 mm square gang arms and frames, it provides a rigid, fully sealed, and high-performance rotational pivot for individual working discs. Featuring SKF-type maintenance-free sealed bearing technology, it delivers superior protection against dirt intrusion, slurry, dust, and moisture under demanding field conditions. Fully interchangeable with OEM cross-reference numbers F06160015R and 910974. Configured with a 4-hole M12x1.25 threaded disc mounting flange on a 98 mm bolt circle (PCD) and a robust M22x1.5 center shaft stud for solid clamping to the frame hanger.

Key features

Direct OEM interchangeabilityDirect replacement part corresponding to original manufacturer references F06160015R and 910974.

Tailored for 80x80 mm framesPrecision mounting geometry designed to fit standard 80x80 mm square gang legs and individual suspension brackets.

SKF-type hub engineeringHeavy-duty sealed angular contact bearing design built to absorb severe combined radial shock and continuous axial side-thrust loads.

High-tensile M22x1.5 center pinHeavy-duty threaded central pivot stud providing dependable, non-slip anchoring against severe rock strikes and field obstacles.

4-hole M12x1.25 disc flangeFine-thread mounting holes spaced at a precise 98 mm bolt circle diameter to secure the disc blade flat and prevent bolt loosening.

Specifications

Commercial part number	55906
Product type	Independent disc bearing hub unit
Flange pattern	4-hole pattern
Bolt circle diameter (PCD)	98 mm
Flange thread pitch	M12x1.25
Center stud thread	M22x1.5
Compatible frame profile	80x80 mm
OEM cross-references	F06160015R, 910974
Bearing unit type	Maintenance-free SKF-style sealed hub

Fitting tipsPrior to installation, thoroughly clean the mounting bracket area on the 80x80 mm frame leg, removing paint buildup, dirt scale, and metal burrs. Slide the M22x1.5 center stud through the carrier arm hole, fit the heavy-duty lock washer, and tighten the locknut to the machine manufacturer's specified torque rating. Place the 4-hole disc blade against the hub flange, aligning the mounting holes with the 98 mm bolt pattern. Thread in the M12x1.25 mounting bolts and tighten gradually in a criss-cross sequence to guarantee uniform seating across the disc center without distorting the hub. Spin the disc by hand to confirm free, smooth rotation, and re-torque all fasteners after the initial 5 to 10 hours of fieldwork.